<html>
<head>
<title>Web-Safe Color Palette</title>
</head>
<body>
<table>
<tr>
<?php
$i = 1;
$row_size = 18;
for($red = 0; $red <= 5; $red++)
for($green = 0; $green <= 5; $green++) {
for($blue = 0; $blue <= 5; $blue++)
{
$red_hex = str_pad(dechex($red * 51), 2, "0", STR_PAD_LEFT);
$green_hex = str_pad(dechex($green * 51), 2, "0", STR_PAD_LEFT);
$blue_hex = str_pad(dechex($blue * 51), 2, "0", STR_PAD_LEFT);
$hex_color = $red_hex . $green_hex . $blue_hex;
print("<td bgcolor=\"#$hex_color\" width=\"15\"> </td>");
if(($i % $row_size) == 0)
print("</tr><tr>");
$i++;
}
}
?>
</tr>
</table>
</body>
</html>